煤矿采煤工作面瓦斯抽采施工设计

发布日期:2022-05-15 06:37 作者:admin  来源:山西燃气集团 点击:

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  求·············································22 五、钻孔(;钻场,)工程

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  孔······················“···························23 七、施工设备与进度计

  划············?·······················25 八、有效抽放瓦斯期间及预期效

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  第一节 采煤事宜面所在及相邻景遇 该采面位于大家矿四水平独层子煤层北翼第一采区第二区段的北 翼,此采面以南是未采的 4124 采面(南段),以北是与田巴凼煤;矿之 间留设的矿 井阻隔煤柱,其下是未部、署的 ”4126 采面(北段),其上、是未发掘,的 ,4122 采,面(北段)。

  第二节 发现范围及可采期 该采面北段走向长 500 米,留 20 米巷道粉饰煤柱后可采走向长 度 480 米,倾斜宽度 133 、米,煤层倾角 20°;采高米,可采储量吨 (即:480×133×××97%=吨),天天开掘一个循环,每一个循?环进; 尺为米,其可采?期 533 ?天(即:480÷=533 天)或 17 个月零 15 天。

  第三“节 地,质构、造及。煤层赋;存情景 一、地质组织 该采面内。无褶皱构造,为一缓倾斜的北东、~南西向展布的单翼构 造;惟有回风平巷在掘进过程中揭揭示了一条落差在米、支配的斜交断 层,另外还有一些数的节理,无岩洞?岩和失陷“柱。 二、煤层赋存!情况 一、全井田内煤层赋存!景。象 该采面所采煤层、为三叠系上统须家”河组第五段所含的独层子煤 层,该 煤层是本井田内全区可采的不巩固煤层,厚度。转变大,构造繁复,一 般由:四个“煤分层组成,即第一分层为“黑色半暗型块煤,硬度大,韧性 强,俗称“天炭”,第二煤分:层为黑色半。亮型粉煤,呈碎块状及粒状, 易零乱,俗称“腰炭”,第三:煤分层”为黑色暗”型“煤,呈粉末:状及鳞“片 “状,俗称“黃壳炭”,第四!煤分层为、黑色半亮“型煤,呈条带状,硬度 小,俗称“厚叶炭”。具有家产!价值的:只要上、部的两?个分:层,即天炭、 和、腰炭。其煤质!为中“~富!灰、特低硫、特低“磷的: 1/!3 焦、煤。 二、本采、面内煤。层赋存情景 在本事件面规模内只挖掘,了上、部两个煤!分层,即天炭”和腰炭,其 有利”厚度为—?米,均衡米,改变较小,煤层“较坚韧;所开采的?煤分层 内含 1—:2 ”层夹矸,夹矸厚度为“~“米,平衡厚度为米;煤层产状为 130° 20°,煤层。倾角变化小,较结实,限度呈。流动”形势,煤质:招牌为! 1/3 焦煤;采高以,见煤层顶,底板为准,均衡为米。

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